Spring事务配置的五种方式

Spring配置文件中关于事务配置总是由三个组成部分，分别是DataSource、TransactionManager和代理机制这三部分，无论哪种配置方式，一般变化的只是代理机制这部分。

    DataSource、TransactionManager这两部分只是会根据数据访问方式有所变化，比如使用Hibernate进行数据访问时，DataSource实际为SessionFactory，TransactionManager的实现为HibernateTransactionManager。

    具体如下图：

Spring事务配置 (2)

    根据代理机制的不同，总结了五种Spring事务的配置方式，配置文件如下：

    第一种方式：每个Bean都有一个代理


    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

                class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
         
       
     

     
            class="org.springframework.orm.hibernate3.HibernateTransactionManager">
       
   
   
   
   
       
   
   
            class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> 
            
               
         
        
         
         
             
                PROPAGATION_REQUIRED
             
         
     

    第二种方式：所有Bean共享一个代理基类


    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

                class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
         
       
     

     
            class="org.springframework.orm.hibernate3.HibernateTransactionManager">
       
   
   
                class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" 
            lazy-init="true" abstract="true"> 
         
         
         
         
             
                PROPAGATION_REQUIRED 
             
         
       
  
   
   
       
   
   
     
          
   

第三种方式：使用拦截器


    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

                class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
         
       
     

     
            class="org.springframework.orm.hibernate3.HibernateTransactionManager">
       
   
  
            class="org.springframework.transaction.interceptor.TransactionInterceptor"> 
         
         
         
             
                PROPAGATION_REQUIRED 
             
         
   
     
     
         
             
                *Dao
             
         
         
             
                transactionInterceptor 
             
         
     
 
   
   
       
   

第四种方式：使用tx标签配置的拦截器


    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

   
   

                class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
         
       
     

     
            class="org.springframework.orm.hibernate3.HibernateTransactionManager">
       
   

   
       
           
       
   
   
   
                    expression="execution(* com.bluesky.spring.dao.*.*(..))" />
                    pointcut-ref="interceptorPointCuts" />       
         

第五种方式：全注解

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

   
   

   

                class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
         
       
     

     
            class="org.springframework.orm.hibernate3.HibernateTransactionManager">
       
   
   

此时在DAO上需加上@Transactional注解，如下：

package com.bluesky.spring.dao;

import java.util.List;

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.stereotype.Component;

import com.bluesky.spring.domain.User;

@Transactional
@Component("userDao")
public class UserDaoImpl extends HibernateDaoSupport implements UserDao {

    public List listUsers() {
        return this.getSession().createQuery("from User").list();
    }
   
   
}


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